Cosmetic brush



FIG. 1 is a front perspective view of a cosmetic brush;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing a brush head and a ferrule is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM I claim the ornamental design for a cosmetic brush, as shown and described. 